The Combined Microwave Barrier – PIR Sensor is developed for detection of movement of personnel and vehicles through detection line. The sensor consists of combined microwave receiver and PIR unit and microwave transmitter unit. Both units are battery operated. The combination of both microwave and PIR technologies provide determination of detected object direction and practically exclude false alarms. The Receiver unit is equipped with wireless module for transmission of alarm signal.
The combined microwave barrier – PIR sensor can be used as part of the larger sensory system or as a standalone devise.

The microwave barrier PIR sensor devise consist of receiver and transmitter units. The transmitter unit sends microwave beam to the receiver unit forming invisible microwave field between them which is coaxial with the PIR sensor sensitive area. When an object crosses the space between the receiver and transmitter units it interrupts the microwave field and successively crosses the PIR sensitive area. (or changes the field strength) an alarm condition is send to the command post through the radio modulus mounted in the microwave receiver unit.
The microwave beam and the sensitive area of the PIR sensor are coaxial and have the same direction.

MARKING

Each composite part of the MWIR has the following marking:

MWIR-R1 Radio receiver module

MWB-T2 Radio transmitter module

PACKING

The MWIR composite parts are packed in plastic “Explorer” case together with the MWB composite parts. The space between the composite parts in the case is filed with foam plastic for protection against impact.
The MWIR command center radio receiver modulus is packed in a separate plastic case.

STORAGE AND TRANSPORTATION

MWIR composite parts can be stored in unheated storehouses and in field conditions in transportation packing. In field conditions it is necessary to use underlying surface or grate.
MWIR composite parts can be transported by any kind of transport.

OPERATING INSTRUCTIONS FOR COMBINED MICROWAVE BARRIER

Bringing MWB in armed state is performed after the two stand holders are placed at distance of 120 m from each other. The microwave transmitter unit is mounted at the first stand holder by using three screws. After mounting the transmitter unit at the first stand holder the unit is powered by connecting it to the battery. The microwave receiver unit is mounted at the second stand holder by using three screws. After mounting the receiver unit at the stand holder the unit is powered by connecting it to the battery. When the battery connection procedure is conducted properly, a photo indicator must light in red or blue.
After several second the photo indicator must turn off which shows that barrier has self-adjust to the current levels of the microwave beam.
To reach the maximal distance coverage the transmitter and receiver units must be mounted at equal height above the ground and directed coaxially to each other.

MOUNTING ALGORITHM

Combined microwave & PIR receiver modulus mounting
1. Stretch stand for fixing the Combined Microwave & PIR Receiver Modulus.
2. Mount the Combined microwave & PIR receiver modulus to the stand, by screwing the 4 screws as it is shown in the figure.
3. Unscrew the cap at the bottom of the modulus, plug the battery inside the groove (the positive side muss point outwards and screw the cap back as shown in the figure.
4. Check for the presence of light indicator on the back panel.

Microwave transmitter modulus mounting
1. Move away up to 120 meters from the place where you mounted the Combined Microwave & PIR Receiver Modulus.
2. Stretch stand for fixing the Microwave Transmitter Modulus.
3. Mount the Microwave transmitter modulus to the stand, by screwing the 4 screws as it is shown in the figure.
4. Plug the battery to the transmitter modulus and drop it inside the groove of the stand as it is shown in the figure.
5. Mount the Microwave transmitter modulus so that its front panel is targeting directly the Combined Microwave & PIR Receiver Modulus front panel. The good targeting is a guarantee for good coverage.

Between the transmitter and the receiver an invisible volumetric microwave field is created. The alarm is caused by disruption of the field.
To check if the barrier is properly installed go in front of the transmitter to interrupt the microwave beam and wait to receive alarm messages in the command center.

After alarm event detection the sensor falls in 2 s inactive mode.Microwave beam check: To ensure that the barrier units are mounted properly and the system is working correct should observe the photo indicator at the back side of the receiver unit while some object or person is crossing the microwave beam near to the transmitter unit. If the photo indicator turns red or blue it means that the barrier is working properly. If the photo indicator doesn’t change its condition (stays dark) you should check the battery connection and/or readjust the direction of receiver and transmitter units to each other. Then repeat the check.Radio communication check: Each time when the photo indicator at the back side of the receiver unit is lighting in red or in blue the unit sends a message to the command post radio unit.

Specifications

Time of setting in operational mode

up to 10 [min.]

Length range

up to 120 [m]

Width range

up to 4 [m]

Grass cover height

up to 0.3 [m]

Snow cover thickness

up to 0.7

Ground undulations

up to 0.3 [m]

Operating temperature range

from -25 to +70 [°C]

Radio communication standard

XBee

Radio communication frequency

900 MHz

Radio communication output power

up to 50 [mW]

Radio communication sleep time

2.5 [s]

Power supply

Battery 3.6 V/ 13 Ah/Size D/ Lithium

Battery life

Over 2 [months]

Microwave beam frequency

10,5 GHz

IR sensitivity length range

up to 70 m

IR Width range

up to 1 m

Grass cover height [m]

up to 0.3 m

Ground undulations [m]

up to 0.3 m

Operating temperature range [ºC]

From -25 to +70

MWB-T2

(LxWxH) 230x220x110 mm

MWB-R2

(LxWxH) 230x220x110 mm

Battery

H= 60 mm; D= 32 mm

MWB-T2 Weight

1192 gr. ± 20 gr. (1246 gr. with battery)

MWIR-R1 Weight

2320 gr. ± 20 gr. (2426 gr. With battery and antenna)

The integration of both microwave and PIR technologies provide determination of detected object direction and practically exclude false alarms. The Receiver unit is equipped with wireless module for transmission of alarm signal.